Crystal MultiCal Pressure Module - Manual (Page 3)

Overview  1
MultiCal H2O/PSI Pressure Module Manual
Overview
—
INTRODUCTION
MultiCal pressure modules are used to measure pneumatic or hydraulic pressures. They can also be used to measure vacuum.
MultiCal modules don’t display pressure, since they only have an electrical output. Instead, the modules convert pressure to millivolts. Modules are used with
devices capable of measuring DC millivolts, such as a digital multimeters or oscilloscopes.
This MultiCal is calibrated to convert pressure units (inches H
2
O or psi) to 1 millivolt per pressure unit. Vacuum readings will be negative.
Pressure is measured by connecting an appropriate fitting to one of the two 1/8" female NPT ports, while plugging any unused port. Any gas or liquid com-
patible with 316 stainless steel, PTFE (polytetrafluoroethylene) impregnated hard anodized aluminum, and buna-n rubber, can be applied to the module as
the pressure source.
The three-position switch is used to power on the unit and to select inches H
2
O or psi scaling for the output. The OFF position is used to measure the internal
battery condition via an external multimeter.
MultiCal modules perform best when used with high accuracy multimeters. The MultiCals can be used with any meter that has 10MΩ or greater input imped-
ance, and (preferably) 4mm banana jacks on 19mm (3/4") centers.
Crystal Engineering is the company that designs, manufactures, markets, and services the MultiCal, nVision, XP2i, 30 Series, M1, and a variety of industry spe-
cific pressure measuring equipment. Crystal Engineering pioneered features like full temperature compensation and “of reading” rated gauges and calibrators.
Pressure measuring equipment is the only thing we do and that’s why we say:
™